Historical Climate Data

Precipitation Summary

Station: 114655 KEITHSBURG, IL

1971-2000 NCDC Normals

Element Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
Prec. (in) 1.38 1.49 2.84 3.39 4.19 4.02 4.03 3.93 3.38 2.59 2.64 2.14 36.02

Precipitation Extremes

Period of Record: 1896-2006


Month
High (in)
Year
Low (in)
Year 		1-Day
Max (in)
Date
Jan 3.97 1949 0.05 1981 1.88 01-04-1971
Feb 4.33 1997 0.02 1987 2.24 02-21-1997
Mar 9.04 1982 0.32 1958 3.50 03-25-1954
Apr 9.52 1973 0.58 1946 3.18 04-22-1973
May 13.39 1996 0.74 1934 4.48 05-10-1996
Jun 8.79 1993 0.14 1963 3.71 06-29-1983
Jul 12.68 1982 0.49 1991 4.95 07-05-1948
Aug 10.94 1993 0.26 1947 4.00 08-09-1969
Sep 11.71 1970 0.01 1979 4.58 09-21-1947
Oct 9.84 1941 0.00 1964 3.90 10-13-1969
Nov 5.81 1985 0.09 2002 2.75 11-01-1984
Dec 4.77 1987 0.25 1958 2.57 12-27-1942
             
Annual 58.05 1982 16.59 1956 4.95 07-05-1948
Winter 9.12 1974 1.03 1931 2.57 12-27-1942
Spring 20.75 1973 3.07 1936 4.48 05-10-1996
Summer 29.41 1993 4.34 1936 4.95 07-05-1948
Fall 16.22 1934 2.14 1953 4.58 09-21-1947

Precipitation Threshold Climatology

Derived from 1971-2000 Averages:

*Annual/seasonal totals may differ from the sum of the monthly totals due to rounding.


Month 		# Days
Total ≥ 0.01" 		# Days
Total ≥ 0.10" 		# Days
Total ≥ 0.50" 		# Days
Total ≥ 1.00"
Jan 6.8 3.8 0.7 0.2
Feb 6.2 3.5 0.7 0.2
Mar 8.7 5.8 1.8 0.6
Apr 9.5 5.9 2.2 0.8
May 10.4 7.6 2.9 1.2
Jun 8.5 5.9 3.0 1.3
Jul 8.3 6.3 2.6 1.2
Aug 8.7 6.0 2.5 1.2
Sep 7.7 5.6 2.2 0.8
Oct 6.7 4.8 1.7 0.6
Nov 7.7 5.1 1.8 0.6
Dec 7.8 4.5 1.3 0.5
         
Annual 97.0 64.8 23.4 9.3
Winter 20.8 11.8 2.7 0.9
Spring 28.6 19.3 6.9 2.6
Summer 25.5 18.2 8.0 3.7
Fall 22.1 15.5 5.7 2.0

Temperature Summary

There are insufficient temperature data to produce the temperature summary.

Snowfall Summary

Station: 114655 KEITHSBURG, IL

1971-2000 Averages

Element Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
Snow (in) 7.7 5.2 2.9 0.7 0.0 0.0 0.0 0.0 0.0 0.0 1.4 5.4 23.3

Snowfall Extremes

Period of Record: 1896-2006

Month High (in) Year 1-Day Max (in) Date
Jan 26.5 1979 32.0 01-23-1932
Feb 17.0 1994 7.0 02-24-1975
Mar 19.0 1960 8.0 03-16-1960
Apr 10.0 1997 8.0 04-11-1997
May 0.0 - - -
Jun 0.0 - - -
Jul 0.0 - - -
Aug 0.0 - - -
Sep 0.0 - - -
Oct 2.0 1967 2.0 10-27-1967
Nov 10.0 1974 7.0 11-30-1974
Dec 22.0 2000 10.0 12-30-1954
Season (Jul-Jun) 49.0 1959-1960 32.0 01-23-1932

Snowfall Threshold Climatology

Derived from 1971-2000 Averages

*Annual values may differ from the sum of the monthly values due to rounding.


Month 		# Days
Total ≥ 0.1" 		# Days
Total ≥ 1.0" 		# Days
Total ≥ 2.0" 		# Days
Total ≥ 5.0"
Jan 2.5 2.1 1.4 0.2
Feb 2.5 2.1 1.4 0.2
Mar 1.3 1.1 0.7 0.2
Apr 0.2 0.2 0.2 0.1
May 0.0 0.0 0.0 0.0
Jun 0.0 0.0 0.0 0.0
Jul 0.0 0.0 0.0 0.0
Aug 0.0 0.0 0.0 0.0
Sep 0.0 0.0 0.0 0.0
Oct 0.0 0.0 0.0 0.0
Nov 0.6 0.6 0.3 0.1
Dec 2.5 2.3 1.5 0.2
Annual 10.5 9.1 5.4 1.0

Growing Season Summary

There are insufficient temperature data to produce the growing season summary.

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Copyright 2007 Illinois State Water Survey
Jim Angel, State Climatologist, jimangel@illinois.edu
Last Modified: September 11, 2007